<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        *{
            margin:0px;padding:0;
        }

        .one{
            height:100px;
            width: 100px;
            background: red;
            float:right;

        }
        .two{
          
            height: 200px;
            width: 200px;
            background: blue;
            clear:both;
        }
    </style>
</head>
<body>
     <div class="one"></div>
     <div class="two"></div>
</body>
</html>